# CVE-2020-8945: GPGME Go wrapper contains Use After Free > A use-after-free in the proglottis Go wrapper for GPGME allows attackers to cause crashes or execute code during signature verification. - **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** A user has to click or open something - **Fix available:** Yes - **Published:** 12 Feb 2020 - **Updated:** 4 Aug 2024 - **Also known as:** DEBIAN-CVE-2020-8945, GHSA-m6wg-2mwg-4rfq, GO-2021-0096, RHBA-2020:1255, RHSA-2020:0679, RHSA-2020:0689, RHSA-2020:0697, RHSA-2020:0928, RHSA-2020:1230, RHSA-2020:1231, RHSA-2020:2027, UBUNTU-CVE-2020-8945 ## What is CVE-2020-8945? CVE-2020-8945 is a high-severity use after free vulnerability in Fedoraproject Fedora, published on 12 Feb 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link. ### Official description The proglottis Go wrapper before 0.1.1 for the GPGME library has a use-after-free, as demonstrated by use for container image pulls by Docker or CRI-O. This leads to a crash or potential code execution during GPG signature verification. Weakness: CWE-416 (Use After Free) ## Which versions are affected by CVE-2020-8945? 3 open source packages ship an affected version, including github.com/proglottis/gpgme. It affects 9 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `github.com/proglottis/gpgme` | Go | All versions | 0.1.1 | | `github.com/proglottis/gpgme` | Go | All versions | 0.1.1 | | `github.com/proglottis/gpgme` | Go | All versions | 0.1.1 | | `containers-common` | Red Hat:openshift:4.1::el8 | All versions | 1:0.1.32-6.git1715c90.el8_0 | | `skopeo` | Red Hat:openshift:4.1::el8 | All versions | 1:0.1.32-6.git1715c90.el8_0 | | `skopeo-debuginfo` | Red Hat:openshift:4.1::el8 | All versions | 1:0.1.32-6.git1715c90.el8_0 | | `skopeo-debugsource` | Red Hat:openshift:4.1::el8 | All versions | 1:0.1.32-6.git1715c90.el8_0 | | `containers-common` | Red Hat:openshift:4.2::el8 | All versions | 1:0.1.32-7.git1715c90.rhaos4.2.el8 | | `openshift-clients` | Red Hat:openshift:4.2::el8 | All versions | 0:4.2.32-202005020632.git.1.1b0fab9.el8 | | `openshift-clients-redistributable` | Red Hat:openshift:4.2::el8 | All versions | 0:4.2.32-202005020632.git.1.1b0fab9.el8 | | `skopeo` | Red Hat:openshift:4.2::el8 | All versions | 1:0.1.32-7.git1715c90.rhaos4.2.el8 | | `skopeo-debuginfo` | Red Hat:openshift:4.2::el8 | All versions | 1:0.1.32-7.git1715c90.rhaos4.2.el8 | | `skopeo-debugsource` | Red Hat:openshift:4.2::el8 | All versions | 1:0.1.32-7.git1715c90.rhaos4.2.el8 | | `cri-o` | Red Hat:openshift:4.3::el7 | All versions | 0:1.16.4-1.dev.rhaos4.3.git9238eee.el7 | | `cri-o-debuginfo` | Red Hat:openshift:4.3::el7 | All versions | 0:1.16.4-1.dev.rhaos4.3.git9238eee.el7 | | `openshift-clients` | Red Hat:openshift:4.3::el7 | All versions | 0:4.3.7-202003130552.git.0.6027a27.el7 | | `openshift-clients-redistributable` | Red Hat:openshift:4.3::el7 | All versions | 0:4.3.7-202003130552.git.0.6027a27.el7 | | `containers-common` | Red Hat:openshift:4.3::el8 | All versions | 1:0.1.40-4.rhaos.el8 | | `cri-o` | Red Hat:openshift:4.3::el8 | All versions | 0:1.16.4-1.dev.rhaos4.3.git9238eee.el8 | | `cri-o-debuginfo` | Red Hat:openshift:4.3::el8 | All versions | 0:1.16.4-1.dev.rhaos4.3.git9238eee.el8 | | `cri-o-debugsource` | Red Hat:openshift:4.3::el8 | All versions | 0:1.16.4-1.dev.rhaos4.3.git9238eee.el8 | | `openshift-clients` | Red Hat:openshift:4.3::el8 | All versions | 0:4.3.7-202003130552.git.0.6027a27.el8 | | `openshift-clients-redistributable` | Red Hat:openshift:4.3::el8 | All versions | 0:4.3.7-202003130552.git.0.6027a27.el8 | | `skopeo` | Red Hat:openshift:4.3::el8 | All versions | 1:0.1.40-4.rhaos.el8 | | `skopeo-debuginfo` | Red Hat:openshift:4.3::el8 | All versions | 1:0.1.40-4.rhaos.el8 | | `skopeo-debugsource` | Red Hat:openshift:4.3::el8 | All versions | 1:0.1.40-4.rhaos.el8 | | `skopeo-tests` | Red Hat:openshift:4.3::el8 | All versions | 1:0.1.40-4.rhaos.el8 | | `buildah` | Red Hat:rhel_extras_other:7 | All versions | 0:1.11.6-8.el7_8 | | `buildah-debuginfo` | Red Hat:rhel_extras_other:7 | All versions | 0:1.11.6-8.el7_8 | | `containers-common` | Red Hat:rhel_extras_other:7 | All versions | 1:0.1.40-7.el7_8 | | `skopeo` | Red Hat:rhel_extras_other:7 | All versions | 1:0.1.40-7.el7_8 | | `skopeo-debuginfo` | Red Hat:rhel_extras_other:7 | All versions | 1:0.1.40-7.el7_8 | Products: Fedoraproject Fedora, Gpgme Project Gpgme, Redhat Enterprise Linux for Ibm Z Systems, Redhat Enterprise Linux for Power Little Endian, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation, Redhat Openshift Container Platform, Redhat Openshift Container Platform for Ibm Z, Redhat Openshift Container Platform for Linuxone. ## How do I fix CVE-2020-8945? Upgrade github.com/proglottis/gpgme to 0.1.1 or later. ## Is CVE-2020-8945 being exploited? There is no known exploitation of CVE-2020-8945 in the wild and no public exploit code. ## Other vulnerabilities in Fedoraproject Fedora - [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild) - [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild) - [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild) - [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild) - [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2020-8945 and fix it if it is affected. What it is: CVE-2020-8945 is a high-severity use after free vulnerability in Fedoraproject Fedora, published on 12 Feb 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link. Exploitation: There is no known exploitation of CVE-2020-8945 in the wild and no public exploit code. Affected packages and fixed versions: - github.com/proglottis/gpgme (Go): affected all versions; fixed in 0.1.1 - github.com/proglottis/gpgme (Go): affected all versions; fixed in 0.1.1 - github.com/proglottis/gpgme (Go): affected all versions; fixed in 0.1.1 Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2020-8945/ (Markdown: https://insights.sbomify.com/CVE-2020-8945/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2020-8945 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-8945 - OSV: https://osv.dev/vulnerability/CVE-2020-8945 --- From sbomify Insights: https://insights.sbomify.com/CVE-2020-8945/ Summaries are generated and may contain mistakes; the official description above is the record.